>
>>>How can you agree, Rich, when even you admit there is no such thing as a
>>>"non-inductive" resistor?
>>>
>>To create a resonance one needs capacitance (the anode-C) and inductance
>>( principally the leads between the anode and the tune-C). Resistors can
>>be in the current path of a L-C resonant circuit, however, resistors do
>>not create resonance
>
>OK, I hate to pick, but ALL real components have Resistance, Capacitance
>and Inductance. So a metal film resistor with a spiral for the film will
>have inductance,
Film resistors whose film does not spiral have Inductance.
>plus there will capacitance between turns of the film.
And C between the end-caps.
>All necessary components for self resonance are there. Only an ideal
>resistor would be "purely" resistive.
>
>So, an real world resistor will have a self resonant frequency. My
>statement is still valid.
>
A resistor that has roughly 10nH of L and 1.5pF of C (the ones we use)
resonate at 1200 MHz. Does it seem likely that this should be of concern
in an HF amplifier?
- later, Jon.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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